In autorotation ya still have complete control over the tilt AND pitch angle of the rotor, Ed. To pull the nose up, (similar to the autogyro), he simply moves the cyclic aft. At the start of the autorotation he pushed the collective lever down to lessen drag, then may actually have had to increase it a little to avoid overspeeding the rotor. But at the bottom, where you hear that "shush-shush-shush-shush" sound... that's where he is increasing the angle of attack on the rotors by pulling up on the collective, thereby setting the bird softly on the ground.Neat.

That's a very well done auto, in what I've always known as an "Iroquois" I've always wondered how it'd work with those lovely big heavy blades... *sigh*

The links after that video, to a few other of autos, well, some of them broke me out in a sweat.

Another thing I've never seen before (though have heard about plenty) is ground resonance. The news here all seems to have links to a recent event in Brazil with a Squirrel.I suppose that is what happened. I've always had the living daylights scared out of me by the prospect of it, but was told that it is not much of a risk in a Robinson.We used to drive a fair few Hughes 300's here, but I never got near to one. Apparently it was quite a risk in them.

Our biggest risk is (would you believe) burning the machine by lighting up grass when landing in the bush.